Manufacture of silica bricks, ganister, and other refractory materials.



s'mrs m3! BBEABLEY AND FRANCIS COLIN MOORWOOD, 0F SHEFFIELD, ENGLAND.

mUFACTUBB O1! SILICA BRICKS, GANISTER, AND OTHER REFRACTORY MATERIALS.

' 958,084,, Specification of Letters Patent. Patented May 17 1910,

(I0 Drawing. Application filed March 22, 1909. Serial No. 485,031.

' Tocll it my concern. been applied to brick making, but these two Be it known that we, IIARRY BREARLEY, substances, even in dilute solutions, mutumetallurgist,and .FnANcIs COLIN Moonwoon, ally decompose each other with formation steel manufacturer, subjects of the King of of calcium silicate in the insoluble form. Greatv Britain, residing, respectively, at 51 This however is not a soluble bond,.and does -Millhouses Lane and at -Wh1rlowdale Road, not decompose during the burning of the both of Sheflleld, Yorkshire, England, have bricks in the manner required. We are also invented .new and useful Improvements in aware that calcium hydrate or calcium sulthe Manufacture of Silica Bricks, Ganister, fate and water have been proposed as a bond and other Refractory Materials, of which for silica and that such compounds are soluthe-following is a specification. ble to some small extent, we however use the 55 In the manufacture of acid refractory materm a calcium substance soluble in water terial's it is usual to add lime as oxid or as including only the more soluble calcium hydrate in the form of an intimate mixture substances 2'. e. substances comparable in with water to act, during the subsequent solubility to the chlorid.

burningas a binding material or flux. By What we claim is this means the lime accumulates more in 1. The process of manufacturinglacid rea one art of the refractory material than in fractory material possessing throng out uni anot er, and consequently such material formly refractory properties, which consists does-notpossess throughout uniformly rcin burning a mixture made .by adding to frac'tor properties, and in use honeycombs silica, Water and a calcium-containing subor brea rsdown through local fusion. stance soluble in water and ca able of de- According to this invention in order to positing lime when heated in su cient quanwholly or partially replace the lime usually tity to produce the requisitesilicatization. used there is added to the silica. an aqueous 2. 'lhe process of manufacturing acid resolution of a salt of calcium which will fractory material composed only of silica 7 o 4 when the mixture (as a brick or ganister or and lime and possessmg throughout uniother form in which an acid refractory maformly refractory properties, which consists teri'al is commonly used) is burned dc osit in burning a mixturecom osed of silica lime. Preferably the soluble salt is a ded water and a substantially so uble compound as such but it might be prepared in situ by of calcium ca able of depositing lime when 76 ad lime and a suitable acid. A chlorid heated in su cient quantity to produce the is; suitable salt to use, and the amount added requisite silicatization.

' should be 'such that the mixture contains 3. The process of manufacturing acid re-. its usual quantity of lime say up to three fractory material composed only of silica per cent. The mixture is burned as usual and lime, which consists in burning a mix- 80 [and lime will be deposited uniformly throughout the mass. Bricks or other artitles made in this manner are not subject to 'local fusions and are mechanically tronger than bricks made with insoluble bonds. sem n-e aware that mixtures of. calcium -ghlorid and sodiinusilieate have already ture composed of silica, water and calcium. chlorid. 1

Witnesses:

LUTHER J. PARK, Cass. N. Demure. 

